In my opinion anyone that folds AA preflop in TEXAS HOLDEM should quit poker and take an interest in Bridge or Solitaire. As for KK it can be folded in a number of scenarios, some of which are with ur opponent is an extreme nit and bets heavy, if an Ace comes on the flop and there is more than 2 of u in the pot and you ain't pot committed (for me at least, instafold), can be folded in tournament situations depending on numerous factors..in most cases though you'd like to get it in with KK...I mean theoretically you're only losing to AA...grow a spine and take a gamble goddammit lol...QQ, I play a lot like JJ...I aproach with extremely caution...I prefer not to go broke with it preflop unless I think I have a solid read on villain but I love to see a flop with it after I do a 5x raise and not receive a reraise